Pulley-covering.



No. 694,046. I R- H WILLIS. Patented Feb. 25 I902.

PULLEY COVERING.

(Application filed. July 5, 1901.

(No Model.)

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UNITED STATES PATENT OFFICE.

ROBERT I-LWI LIS, or CHICAGO, ILLINOIS.

PULLEY-COVERlNG.

SPECIFICATION forming part of Letters Patent No. 694,046, dated February 25, 1902. Application filed July 5,1901. seen to. 67,157. on model.)

To all whom it may concern:

Be it known that LROBERT H. WILLIs, a citizen of the United States, residing at C-hicage, in the county of Cook and State of Illinois, have invented certain new and useful Improvementsin Pulley-Coverings, of which the following is a specification.

My invention relatesto improvements in pulley-coverings, and pertains to means by which a heavy canvas can be'used without applying a coat of cement to the outside surface of the canvas, as is usually the case.

The object of my invention is to provide a pulley-covering with beveled edges to permit the belt to readily slide on or off andv to provide an interlocking lap-joint of the same thickness as the canvas, thus rendering the covering practically endless, all of which will be fully described hereinafter and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical sectional view of a pulley-wheel provided with my improved covering, the ends of the canvas raveled for forming the joint. Fig. 2 is a vertical sectional view of a pulleywheel with the covering and joint cemented.

Fig. 3 is a transverse sectional view showing the edges raveled out. Fig. i is a transverse sectional view showing the canvas cemented to the pulley.

Referring nowto the drawings, the numeral 1 indicates an ordinary pulley-wheel, of wood, iron, or composition, and '2 the heavy canvas covering.

The pulley to be covered is first cleaned with a strong solution of sal-soda or like substance, rinsed and wiped perfectly dry, and given a coat of cement about the consistency of milk, which is allowed to dry. The face of the wheel is then measured and the canvas cut one-half an inch narrower'and one longitudinal thread on each side raveled out, as illustrated in Fig. 3, for the purpose of forming beveled edges, as will be presentl y explained. The transverse threads or warp is raveled out and removed from one end of the canvas about an inch and the upper layer of longitudinal threads 3 cut off close to the transverse thread t. I apply the covering by first cementing the lower layer of threads 5 to the pulley,'applying the cement to the can- Vas in the consistency of thick molasses, workcausing the look, after which a light coat of cement is ing the canvas down even and smooth with a paddle and allowing the excess cement to work out freely into the raveled ends 6. The

covering is thus applied until within a foot of the ends 3 and 5, when the free end of the canvas is cut off even with and adapted to abut against the transverse thread 4. The transverse threads are removed from this end of the COVQl'lDg until the free ends 7 are equal in length to the raveletl ends 5, as illustrated in Figs. 1 and 2. The two layers of longitudinal threads '7 are then cemented down on the previously-cemented layer of threads 5, as shown in Fig. 2, the ends being smoothed out and hammered down with a mallet, thus free ends of the threads to intertonched over the joint and rubbed smooth. The free ends 6 should be worked down into the cement which has oozed out while applying the canvas, thus forming a bevel edge on each side of the pulley, which will permit the belt to slide on or off, as will be readily understood.

While I have here described my invention as especially adapted to pulleys, this method of forming a joint for uniting canvas or fabrics for other purposes may be employed without departing from the spirit of my invention.

Attention is called to the fact that there are three threads employed in forming the joint, which constitutes the same number used in the body of the canvas. The covering is therefore of a uniform thickness.

In the usual method of covering pulleys,

wit-h a thin canvas and then applying a coat of cement to the outside surface the covering is soon rendered as smooth if not smoother than the plain pulley, as the surface will he-. come glazed. My improved interlocking joint forms an endless covering which will adhere to a pulley without the necessity of applying cement to the outside surface. Thus the natural adhesiveness of the cotton is preserved and the belt prevented from slipping. Having thus described my invention, what I claim, and desire to seizure by Letters Patcut, is-- I 1. The combination of a pulley, the canvas 2 adapted to be cemented thereto and having a series of raveled threads extending around the pulley and forming beveled edges, the layers or threads 5 extending beyond the transverse thread at the threads or layers 7 equal in length to the layer 5 and adapted to be cemented down and abut against the end of the threads 3 and the transverse threads 4, substantially as described.

2. The combination of a pulley, the canvas cemented thereto, and having the free ends of the threads 5 and 7interlocking and adapted to be cemented and the laterally-disposed threads 6 adapted to be cemented forming circumferential beveled edges, substantiallyas described. I

3. The combination of a pulley, the canvas 2 cemented thereto and of a Width less than that of the face of the pulley and having the free ends or threads 6 forming beveled edges, .he canvas having the free ends of the circumferential threads5extending to the transverse threads 8, the circumferential threads 7 extending to the ends of the circumferential threads 3 and the transverse threads 4:, and the said threads 3, 4, 5 and 7 adapted to K be cemented, substantially as described.

4.. The combination with a pulley, of a can- I vas covering cemented thereto and having a portion of the warp adjacent the edges removed and the weft cemented, substantially as described.

5. The combination With a pulley, of a canvas covering cemented thereto, and having a portion of the weft removed and the warp cemented and the adjoining ends having the Weft removed and the Warp overlapping and cemented substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ROBERT I-I. WILLIS.

WVitnesses:

S. W. Fox, EDWARD WARD. 

